Adaptive Filtering

Abstract

A system and method include equalizing filtering with controllable transfer functions in a signal path downstream of an input signal path, and controlling with filter control signals of the controllable transfer function for filtering according to an adaptive control algorithm based on at least one error signal and an input signal on the input signal path. The adaptive control algorithm includes a windowed magnitude constraint with an integrated post-ringing constraint.

Description

technical field [0001] The present disclosure relates to adaptive filtering systems and methods. Background technique [0002] Spatial sound field reproduction technology utilizes multiple speakers to create a virtual auditory scene over a large listening area. Several sound field reproduction techniques such as Wave Field Synthesis (WFS) or Ambisonics utilize loudspeaker arrays equipped with multiple loudspeakers to provide highly detailed spatial reproduction of sound scenes. In particular, wave field synthesis is used to achieve highly detailed spatial reproduction of acoustic scenes to overcome limitations by using arrays of eg tens to hundreds of loudspeakers. [0003] Spatial sound field reproduction technology overcomes some limitations of stereo sound reproduction technology. However, technical constraints prohibit the use of large numbers of loudspeakers for sound reproduction. Wavefield synthesis (WFS) and ambisonics are two similar types of sound field reproduc...

AI Technical Summary

Problems solved by technology

Therefore, listening rooms should not exhibit considerable wall reflections, as the reflected part of the reflected wavefield will distort the reproduced wavefield

In many situations such as the interior of an automobile, the necessary acoustic treatment to achieve such room characteristics may be too expensive or impractical

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